Formation of colloidal silver in water by ultrasonic irradiation
Stable colloidal dispersions of silver were prepared by ultrasonic irradiations of aqueous AgClO4 or AgNO3 solutions in the presence of surfactants.
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Effects of sample thickness and fiber aspect ratio on EMI shielding effectiveness of carbon fiber filled polychloroprene composites in the X-band frequency range
The electromagnetic interference shielding effectiveness and return loss of short carbon-filled polychloroprene rubber composites of varying sample thickness and fiber aspect ratio were studied in the frequency range of 8 to 12 GHz (X-band). It was observed that composites prepared by the cement-mixed method with high…
Extrudates of Cornstarch with Urea and Glycols: Structure/Mechanical Property Relations
Abstract Urea, various glycols and mixtures of these were tested as plasticizers for gelatinized cornstarch. Mixtures of cornstarch, urea and/or triethylene glycol, glycerol or propylene glycol were extruded into ribbons. Mechanical and structural properties of the ribbons were evaluated by tensile testing, DSC and NM…
Trends in the Development of Bioresorbable Polymers for Medical Applications
The gradual shift from biostable prostheses to degradable, temporary implants represents one of the most significant trends in biomaterials research. In view of this trend, medical applications of degradable implant materials were reviewed with special emphasis on orthopedic polymeric implants. Among the polymeric imp…
Synthesis and properties of polyoxometalates based inorganic-organic polymers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of polyoxometalates based inorganic-organic polymersP. JudeinsteinCite this: Chem. Mater. 1992, 4, 1, 4–7Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 1992https://pubs.acs.org/doi/10…
Design and first applications of a post-column imaging filter
We have designed and built an imaging filter which can be attached to most stan- dard TEMs, and is capable of operating at primary energies of up to 400 keV. The filter uses a 90m agnetic sector prism, a piezoelectrically controlled energy-selecting slit, and 6 quadrupole and 5 sextupole lenses. It fully corrects seco…
Structure Refinement of Mullite by the Rietveld Method and a New Method for Estimation of Chemical Composition
The structure of mullite was refined by the Rietveld method, and a new method for the estimation of chemical composition of mullite was proposed. Mullites were synthesized by firing the starting materials prepared by sol–gel and spray pyrolysis methods at various temperatures. Linear correlations were recongnized betw…
Effect of Starch Granule Size on Physical Properties of Starch‐Filled Polyethylene Film
Abstract Physical properties of blown films (25‐60‐μm thickness) from compounded mixtures of linear low‐density polyethylene (LLDPE) and starch were investigated. As starch content increased, tensile strength, percent elongation, and light transmittance decreased and film thickness increased. Among the tested films, s…
The ordered bicontinuous double-diamond morphology in diblock copolymer/homopolymer blends
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe ordered bicontinuous double-diamond morphology in diblock copolymer/homopolymer blendsKaren I. Winey, Edwin L. Thomas, and Lewis J. FettersCite this: Macromolecules 1992, 25, 1, 422–428Publication Date (Print):January 1, 1992Publication History Published online1 May 2002…
Silicon carbonitride from polymeric precursors: thermal cross-linking and pyrolysis of oligosilazane model compounds
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon carbonitride from polymeric precursors: thermal cross-linking and pyrolysis of oligosilazane model compoundsN. S. Choong Kwet Yive, R. J. P. Corriu, D. Leclercq, P. H. Mutin, and A. ViouxCite this: Chem. Mater. 1992, 4, 1, 141–146Publication Date (Print):January 1, 1…
The incorporation and migration of protons in Nd-doped BaCeO3
A detailed study of protonic conductivity in Nd-doped BaCeO3 is made using water-uptake and galvanic-cell measurements to supplement the conductivity results. Samples were pretreated at 900°C at different PH2O atmospheres and the conductivity measured with a frozen-in proton concentration. Isotope effect (D2O versus H…
Polyoxometalates catalyst materials: X-ray thermal stability study of phosphorus-containing heteropolyacids H 3 +x PM 12 –x V x O 40 ·13–14H 2 O (M = Mo,W; x= 0–1)
The phase evolution, under thermal treatment, of the 12-molybdo(tungsto)phosphoric acids and their related 1-vanado-substituted compounds has been studied by in situ X-ray diffraction methods. The anhydrous acid temperature range is clearly observed for the 12-molybdo(tungsto)phosphoric acid parents via formation of a…
Mechanistic modeling of epoxy-amine kinetics. 1. Model compound study
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanistic modeling of epoxy-amine kinetics. 1. Model compound studyJovan Mijovic, Arnon Fishbain, and Jony WijayaCite this: Macromolecules 1992, 25, 2, 979–985Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January…
Photocatalytic oxidation of organic compounds by polyoxometalates of molybdenum and tungsten. Catalyst regeneration by dioxygen
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotocatalytic oxidation of organic compounds by polyoxometalates of molybdenum and tungsten. Catalyst regeneration by dioxygenA. Hiskia and E. PapaconstantinouCite this: Inorg. Chem. 1992, 31, 2, 163–167Publication Date (Print):January 1, 1992Publication History Published o…
Structure and thermodynamic properties of nanocrystalline metals
Nanocrystalline (nc) metals show significant differences in their thermodynamic properties, such as specific heat at constant pressure and thermal expansion, in comparison to polycrystalline metals. These properties are explained in terms of a macroscopic analysis. Based on a quasiharmonic approximation, the thermodyn…
Synchrotron radiation crystallography
Properties of synchrotron radiation optical elements of a diffraction beamline synchrotron data measurement accuracy and the mapping of charge densities with synchrotron radiation anomalous scattering time resolved studies and the response of crystals to external perturbations multi-wavelength methods high resolution…
Ferromagnetically coupled gadolinium(III)copper(II) molecular material
International audience
Micellization of polystyrene-poly(ethylene oxide) block copolymers in water. 5. A test of the star and mean-field models
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicellization of polystyrene-poly(ethylene oxide) block copolymers in water. 5. A test of the star and mean-field modelsRenliang Xu, Mitchell A. Winnik, Gerard Riess, Benjamin Chu, and Melvin D. CroucherCite this: Macromolecules 1992, 25, 2, 644–652Publication Date (Print):J…
Production of Fine, High‐Purity Beta Silicon Carbide Powders
Submicrometer SiC ( β ‐form) powders were synthesized by reacting silica and carbon black at temperatures between 1450° and 1800°C. Simultaneous application of vacuum and mixing provides the condition for full conversion of silica to SiC. It was shown that two different reaction mechanisms are possible, depending on t…
A polyoxometalate incorporating an organoimido ligand: preparation and structure of [Mo5O18(MoNC6H4CH3)]2-
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA polyoxometalate incorporating an organoimido ligand: preparation and structure of [Mo5O18(MoNC6H4CH3)]2-Yuhua Du, Arnold L. Rheingold, and Eric A. MaattaCite this: J. Am. Chem. Soc. 1992, 114, 1, 345–346Publication Date (Print):January 1, 1992Publication History Published…